public function preDelete(PropelPDO $con = null)
{
$server = $this->getEtvaServer();
$node = $server->getEtvaNode();
$logicalvol = $this->getEtvaLogicalvolume();
$lv = $logicalvol->getLv();
//remove disk RRA files
$server_disk_rw = new ServerDisk_rwRRA($node->getUuid(), $server->getUuid(), $lv, false);
$server_disk_rw->delete();
return true;
}
